Cummingtonite-Grunerite (series) [ ◻{Mg2}{Mg5}(Si8O22)(OH)2 — ◻{FeII2}{FeII5}(Si8O22)(OH)2 ]
Material properties
| Formula | ◻{Mg2}{Mg5}(Si8O22)(OH)2 — ◻{FeII2}{FeII5}(Si8O22)(OH)2 |
| Crystal symmetry | Monoclinic, Point group 2/m, Space group C2/m (#12) |
| Classification | Mg-Fe-Mn amphibole |
| Members | Cummingtonite, Grunerite, Cummingtonite (var. Fe2+) |
| Reflectance line | OH |
| Search other databases | webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database |
| Tags | Hydroxide, Series, Silicate |